I somehow put my mothers phone connected to mine and now I am getting all her messages and phone calls how can I get her off so she can get her phone calls

It sounds likely you are using a single Apple ID. She needs to get her own.

Click here to see how to 'Create an Apple ID' = create an Apple Account. --> hhttps://support.apple.com/HT204316

Have her sign out of your account then sign in with the new one.

Sign out of iCloud on your iPhone, iPad, iPod touch, Apple TV, or Mac --> https://support.apple.com/HT208242

If another Apple ID is signed in you may need to enter the password for that ID to sign out of that ID first.

Click on this link to learn how to 'Sign in with your Apple ID' --> https://support.apple.com/HT204053

Click on this link to learn how to 'Set up iCloud on your iPhone, iPad, or iPod touch' --> https://support.apple.com/HT208681